JPH07376U - Disposable dental needle - Google Patents

Abstract

(57) [Summary] [Purpose] When a dentist injects a drug solution into the oral cavity of a patient using a syringe, the tip of the injection needle attached to the tip of the syringe is cut off from the angled blade tip. The injection direction of the injection solution should be selected and set appropriately even when the injection needle is placed in a place where it is difficult to see the blade edge. A portion of the peripheral surface of the tip side of a holder 33 made of a synthetic resin material holding the needle body 30 aligned with an oblique cutting surface of a blade tip 31 on the tip side of the needle body 30, and a blade tip 31.
Colored indexes 5 and 6 are attached to the diagonal cutting surface and the portion located on the opposite side, and the coloring of each of the pair of indexes 5 and 6 is set to a different color.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a disposable dental injection needle which is used by a dentist to attach the anesthetic to the gingiva in the oral cavity of a patient by using a syringe in the dental treatment. Regarding

[0002]

[Prior art]

 An ampoule a in which a dentist injects an injection solution such as an anesthetic to be injected into the oral cavity of a patient in a dental treatment is usually a glass whose one end is sealed with a rubber film 10 as shown in FIG. The tube 11 is filled with the injection solution from the opening end on the other end side, and a rubber stopper 12 formed into a shape that fits into the glass tube 11 like a piston is fitted and sealed at the opening end. The injection solution is prepared by being sterilized and enclosed in the ampoule a made of the glass tube 11.

When the dentist performs an injection operation, as shown in FIG. 1, the cylinder 20 and the plunger 21 that is removably fitted into the cylinder 20 are inserted into the cylinder 20 of the syringe b. The ampoule a made of the above-mentioned glass tube 11 is inserted so that the side of the rubber film 10 is ahead, and then the plunger 21 of the syringe b is pushed in, so that the inner end of the ampoule a is inserted into the glass tube 11 of the ampoule a. Abut on the rubber plug 12 fitted on the base end side. In addition, the connecting shaft portion 200 at the tip of the cylinder 20 of the syringe b is provided with sharp blade edges 31 and 32 on both the base end side and the tip end side of the needle body 30 and is held by the holder 33. While holding the separate injection needle c such that the blade edge 32 on the proximal end side thereof projects into the cylinder 20 through the through hole of the axial center of the connecting shaft portion 200 of the cylinder 20 of the syringe b, the holder 33 The fitting cylinder part 330 on the base end side is screwed onto the outer periphery of the connecting shaft part 200 of the injector b, whereby the cutting edge 32 on the base end side of the injection needle c is The rubber film 10 on the tip side of the glass tube 11 of the ampoule a loaded in the cylinder 20 of the syringe b is pierced to communicate with the inside of the glass tube 11 to obtain the state of FIG.

Next, from this state, holding the syringe b, the tip 31 of the needle body 30 of the injection needle c is pierced into the gingiva in the patient's oral cavity, and the plunger 21 is pushed in. The drug solution in the glass tube 11 is opened to the cutting surface of the blade tip 31 of the tip of the injection needle c by pushing the rubber stopper 12 fitted on the proximal end side of the tube 11 into the glass tube 11. It is used so that it is injected into the gingiva through the hole. In the illustrated example, the syringe b is of a type in which the plunger 21 is manually pushed, but the same applies to the case where the plunger 21 is automatically pushed by driving a motor.

After the treatment, the injection needle c is removed from the syringe b and discarded to prevent an infectious disease. Therefore, in a sterilized state, the injection needle c has a cap-shaped case body 40 that is fitted and inserted so as to cover from the distal end side of the injection needle c, as shown in FIGS. 3, 4, and 5. It is covered and sealed by the cap-shaped lid 41 which is fitted so as to cover from the proximal end side of the injection needle c and fitted to the outer periphery of the case body 40 at the proximal end side, and is opened for each patient. It is made in a disposable form for use.

[0006]

[Problems to be solved by the device]

 As described above, the disposable dental injection needle c that is used by being attached to the tip of the cylinder 20 of the syringe b has a sharp cutting edge 31 formed by obliquely cutting the tip of the needle body 30 at the tip. Therefore, the injection liquid is ejected in a direction perpendicular to the oblique cutting surface forming the sharp cutting edge 31, and thus is obliquely ejected with respect to the axial direction of the needle body 30. Like For this reason, the dentist looks at the shape of the cutting edge 31 when piercing the gingiva of the patient with the injection needle c to determine the direction in which the injection solution is ejected, and the injection solution to be injected is directed around the tooth. In this state, the patient's pain due to the infusion of the injection solution is relieved.

However, depending on the location of treatment, the blade edge 31 may be obscured by the teeth, making it difficult to see and set the injection direction of the injection solution with precision.

From this, on the tip side of the holder 33 supporting the needle body 30 of the injection needle c, the index is placed on the portion of the tip of the needle body 30 that coincides with the direction of the oblique cutting surface of the sharp cutting edge 31. By referring to this index, the dentist who is performing the treatment deals with the case where the tip side of the needle body 30 is hidden behind the teeth and is difficult to see.

However, even in this case, depending on the affected area to be injected, it may be less painful for the patient to make the injection solution to face the tooth side in the opposite direction. Since the index is located on the back side with respect to the line of sight of the dentist to be operated, there is a problem that it is difficult to determine the direction of the cutting surface of the cutting edge 31 of the needle body 30 by the index.

[0010]

【Purpose】

 The present invention has been made to solve the above-mentioned problems occurring in the conventional means, and when a dentist injects a drug solution into the oral cavity of a patient with a syringe, The selection and setting of the injection direction of the injection liquid from the blade tip that is cut off diagonally at the tip of the attached injection needle can be performed accurately even when the injection needle is placed in a place where it is difficult to see the blade tip. Its purpose is to provide a new means of enabling it.

[0011]

[Means for Solving the Problems]

 And, as a means for achieving the above-mentioned object, the present invention provides a thin hollow needle-shaped needle body made of a metal material at a shaft core portion of a holder formed by a synthetic resin material in a shaft cylindrical shape. The tip end side and the base end side of the needle body are held in a state of protruding from the holder, respectively, and the tip end side and the base end side of the needle body are formed with slanting cutting edges respectively, Is equipped with a fitting cylinder on the proximal side that fits with the connecting shaft of the tip of the cylinder of the syringe, and the beveled cutting edge of the tip of the needle on the peripheral surface of the holder. Characterized by attaching colored indexes to the part that is aligned with the surface and the part that is located on the side opposite to the diagonal cutting surface of the cutting edge, and set the coloring of each of the pair of indexes to different colors. It proposes a disposable dental injection needle.

[0012]

【Example】

 Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent members having the same effects as those of the conventional means.

FIG. 6 is a front view of a disposable dental injection needle c according to the present invention, and FIG. 7 is a side view of the same injection needle c.

The injection needle c has a needle body 30 formed of a metal material in the shape of a thin hollow needle at a distal end side and a proximal end side at a shaft core portion of a holder 33 formed by a synthetic resin material into a shaft cylinder shape. The needle body 30 is inserted into the holder 33 so as to be integrally connected to the holder 33, and the needle body 30 is integrally fixed to the holder 33. Sharp needle edges 31 and 32 are formed by cutting the needle body 30 at an angle, and the holder 33 made of a synthetic resin is provided with a syringe on the base end side thereof as shown in FIGS. 1 and 2. A fitting cylinder portion 330 that fits and is connected to the screw shaft-shaped connecting shaft portion 200 formed at the tip of b is formed, and as shown in FIGS. Regarding forming and forming a fitting portion for fitting the case body 40 and the lid body 41 of FIG. It is no different from the one.

However, the injection needle c has a sharp cutting edge on the tip of the needle body 30 held by the holder 33 on the peripheral surface of the holder 33 made of a molded body of the synthetic resin material. An index 5 colored in red, blue, black, etc. is attached as shown in FIG. 6 to a portion aligned with the oblique cutting surface forming 31 and the index 5 and 180 are arranged in the circumferential direction. Another index 6 is provided at the portion located on the back side of the cutting surface of the cutting edge 31, which is the portion that has been displaced (FIG. 7). The colors of the pair of indexes 5 and 6 are set to have different colors such as red and black or red and blue.

[0016]

[Effect of device]

 The disposable dental injection needle c according to the present invention constructed as described above is opened by removing the case body 40 and the lid 41 which are sealed in a sterilized state, and is opened by a synthetic resin material. 33 is fitted and attached to the connecting shaft portion 200 at the tip of the cylinder 20 of the syringe b, and is connected and communicated with the ampule a loaded in the cylinder 20 of the syringe b as shown in FIG. When the dentist operates the syringe b to inject a prescribed site in the oral cavity of the patient, for example, an index attached to the side of the needle body 30 that corresponds to the cutting surface of the sharp cutting edge 31. If 5 is red and the index 6 attached to the back side opposite to the cutting surface of the cutting edge 31 is black, the cutting edge 31 of the needle body 30 may be located on an affected part located outside the dentist's field of view. When injecting, the needle 30 By looking at the pair of indexes 5 and 6 provided at the tip of the holder 33 located on the end side and visually recognizing their positions and colors, the cutting surface of the sharp cutting edge 31 of the tip of the needle body 30 The direction of can be confirmed accurately.

Therefore, a pair of different color indicators 5 and 6 attached to both the front and back surfaces of the peripheral surface of the tip portion of the holder 33 of the injection needle c with reference to the cutting surface of the cutting edge 31 of the needle body 30 are seen. Thus, by operating the syringe b, it becomes possible to easily select and set the injection direction of the injection liquid from the blade edge 31 at the tip of the needle body 30 of the injection needle c.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a syringe, an injection ampoule, and an injection needle are separated from each other.

FIG. 2 is a perspective view showing a state where an injector, an ampoule and an injection needle are set in the same as above.

FIG. 3 is a side view of the above injection needle.

FIG. 4 is a side view showing a state in which the case body of the above injection needle is covered.

FIG. 5 is a side view showing a state in which the lid of the above-mentioned injection needle is further covered and sealed.

FIG. 6 is a front perspective view of an injection needle according to the present invention.

FIG. 7 is a perspective view of the same injection needle as the state of FIG. 6 rotated by 90 degrees.

FIG. 8 is a longitudinal side view of the same injection needle.

[Explanation of symbols]

a ... Ampule, b ... Syringe, c ... Injection needle, 10 ... Rubber film, 11 ... Glass tube, 12 ... Rubber stopper, 20 ... Cylinder, 200 ... Connection shaft part, 21 ... Plunger, 30 ...
Needle body, 31/32 ... Blade edge, 33 ... Holder, 330 ... Fitting cylinder portion, 40 ... Case body, 41 ... Lid body, 5/6 ... Index.

Claims (1)

[Scope of utility model registration request] 1. A needle body 30 formed of a metal material in the shape of a thin hollow needle is provided at a tip end side and a base end side of the needle body 30 at a shaft core portion of a holder 33 formed in a cylindrical shape by a synthetic resin material. And so as to project from the holder 33, and the cutting edges 31 and 32 that are obliquely cut are formed on the tip end side and the base end side of the needle body 30, respectively.
3, a fitting cylindrical portion 330 that fits with the connecting shaft portion 200 at the tip of the cylinder 20 of the syringe b is provided on the proximal end side, and the tip end side of the needle body 30 is formed on the tip end side peripheral surface of the holder 33 thereof. Colored parts 5 and 6 are attached to the part of the side of the cutting edge 31 aligned with the oblique cutting surface and the part of the cutting edge 31 located on the side opposite to the oblique cutting surface, and the pair of the indexes 5 and 6 is attached. 6
Disposable dental injection needle characterized in that each coloring of each is set in different colors.